He replaces Lara Yocarini, who is stepping down after more than three years on the Rabobank New Zealand board.
Subject to regulatory approval, Yocarini has taken up a new role as chief executive officer of Rabobank's global asset finance subsidiary De Lage Landen (DLL). She will also be a member of Rabobank's managing board. Wiessing had more than 30 years' international experience in the financial sector, including postings in South America, Africa, Asia and Eastern Europe.
He joined Rabobank in 2006 and was regional manager South America and chief executive officer for Brazil for eight years prior to his appointment as regional manager for Rabobank Australia and New Zealand in May 2023.
Before joining Rabobank, Wiessing held roles with other leading financial institutions, including Standard Bank of South Africa, Citibank and ING.